afaict, those are just regular LED lights. Nothing KNX specific. Please verify with them what kind of key pads, what kind of dimmer and what kind of IP interface they offer. To me, this does not look like a KNX install.

The above is all they sent me, and I can't afford the cost. Unless there is any value in getting the info, I think I'd rather move on. You seem to know what's needed, please point me in the right direction so I can do it at a lower cost.

Is it possible for me to use the suppliers you mentioned? Do they carry US compatible equipment?

EDIT: I just checked my pricing: The list price for my installation was around 38EUR/light, plus around 450EUR for one-of equipment, like gateway and PSU. Doing a bit of shopping around, it is easy to get price down to ~25EUR/light, and around 250EUR for one-of equipment.

either get squeezeboxes for the zones where you don't have a LMCE MD or use soft squeeze on the core with an audio distribution system

Can I sync the payers when playing music on multiple MDs while keeping the ability to play different tunes when the situation changes? (in other words, are the players independent by syncable on demand?)

Dedicated power circuit for the wiring closet with your equipment.Run the light fixture in the closet off of a separate circuit. (In case you have to do power work in there, you still have light to work by)

Does the dedicated circuit for the equipment, or both need to carry the load of the lights in the case of KNX?